This beautiful postcard was part of the Ceylon Tea Propaganda Board's (CTRB) evangelizing mission to demonstrate the island's rich tea economy. The Board was founded in 1932 and has since been folded into the Ceylon Tea Board, the industry's governing authority. In the 1934, the CTRB even produced a movie, Song of Ceylon, as part of its campaign. In general, postcards played a remarkable role in introducing customers around the world to this new drink, giving context through images of plantations, workers, crop, transportation and processing facilities to what has since become a regular part of people's daily lives in the subcontinent and abroad. A yet-to-be-found item in this genre would show someone drinking a cup of tea while reading a postcard just as a Lipton's cart full of tea leaves rambles along a dusty road alongside the verandah.
MacDonald Gill, the artist behind this map, apparently first drew this famous map in 1933 (Erika Gill, A Thirst for Empire (2017, p. 301).